Effect due to the Fatigue of Tension Lifter Typed Spiral Spring

Abstract

The tension lifter of cam chain obtains the both tensile and compressive force. Due to the flap of cam chain, both an alternating loads are called the fluctuating load. After some mileages, the fatigue occurred in spiral spring which affects to the tension of cam chain reduction, abnormal noise, and engine damage occurred. This study is the testing of tension lifter of cam chain which was used in variety of distances. The goal was to find the properly distance that gives the tension lifter the best compressive resistance. The testing results show the distance of 0- 5000 km that the springs have the best endurance. Furthermore, the testing gave the fatigue affects on compressive resistance of tension lifter which is decreased proportion to the distance.